I'm guessing - and it's only that - Dan has experienced people saying his last name in such a way that
he perceives as anti-semitic**. He definitely doesn't care for Barstool, and probably equated Barstool Eddie with some of the racism that can be seen from Barstool (who toe the line) and their followers (some of whom don't care if they leap over the line).
Now, I do not follow Barstool outside of Big Cat and PFC (who I do think are really good at what they do), but from what I gather, Barstool Eddie is a well liked individual and not the typical Barstool personality. Dan's issue here is that he doesn't want to separate Eddie the guy, from Barstool. Maybe it's a "the company you keep" type thing, whatever. I think being able to separate is the more mature thing.
As for Portnoy, this is an extreme overreaction. This isn't Boers and Bernstein Dan. He's not what he once was.
** I understand that you (not
@Adipost, but the global "you") don't think saying his last name can come off as anti-semitic but none of us get to tell a person how to feel.